Help! What is missing here (pics inside) 2000 RX

Hi,

I am not too familiar with Seadoos, but my buddy has a 2000 rx ME that recently started cavitation really bad. We took a look in the jet pump and saw black (what we thought at the time) rubber hanging down that looked all cut up. It was rode since then, and we just today took the jet pump apart. Whatever that piece was is now gone. It looks as though something is missing here, but I am not sure what. There is also a whole lot of clearance between the impeller and the wear ring. On my gp1300r that is a bad thing so I assume that is the same here. Also the prop is not in good shape. Outside of impeller rework, what do we need to do to fix whatever is missing? When the jet pump is on, we noticed a good half inch gap between the wear ring and the fiberglass of the ski..not sure if that is normal.

By running the ski without this seal, you allowed the whole pump to rattle around, tearing up the wear ring and impeller, and probably the pump bearings............now your looking at big $$$$ to fix a simple problem........

Yeah half if the wear ring is still in there. That white ring has to come out or your not going to fit the new wear ring in there. Make sure you take the 4 screws out that holds it in too. 2 of them are under the siphon tubes so you have to slide the tubes off to get to them